A cotter pin is a metal pin with a shape similar to a hairpin. Use a cotter pin to secure bolts and provide an added measure of safety to bolt connections. Make sure the cotter pin fits properly into the hole (there should not be any extra movement when the cotter pin is in the hole) and then bend the ends of the cotter pin around the bolt to secure the pin and finish the connection.
Instructions
1. Insert the bolt through a prepared hole. Place a washer over the bolt where it extends out from the prepared hole.
2. Thread the nut onto the bolt and tighten the nut to the desired tightness. Hand tightening may be sufficient or a wrench may be necessary, depending on the situation.
3. Insert the cotter pin through the hole in the bolt. Push the pin through until you cannot push it any further.
4. Bend the two protruding ends of the cotter pin in opposite directions over the end of the bolt. Do not bend the cotter pin ends further than the diameter of the bolt or down across the washer.
5. Tap the cotter pin ends lightly with the mallet to make them tight against the bolt.
6. Clip off any excess cotter pin ends if they protrude further than the recommended length.
Tags: cotter ends, ends cotter, further than, over bolt, prepared hole
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